Misoprostol Versus Oxytocin for the Reduction of Postpartum Blood Loss
Bibliographic record
Abstract
A large majority of maternal deaths from postpartum hemorrhage take place in countries with limited resources. Because uterine atony is the usual cause, standard treatment has been to administer oxytocin intravenously in the third stage of labor. Misoprostol, a synthetic analog of prostaglandin E1, also has uterotonic activity and, in addition, is inexpensive and thermogenically stable, and may be administered orally, sublingually, vaginally, or rectally. This prospective, randomized, double-blind trial compared the effects of 5 U of oxytocin, given intravenously, with those of 400 μg of orally administered misoprostol in 622 women with a single fetus in cephalic presentation who were in spontaneous or induced labor before planned vaginal delivery. The study drugs were given after delivery of the anterior shoulder or within a minute of delivery. The primary outcome was a decrease in hematocrit of at least 10% when estimated 24 hours after delivery. Secondary outcomes included a drop in hemoglobin of 30 mg/L or more, an estimated blood loss exceeding 1000 mL, blood transfusion, use of additional oxytocic drugs, manual removal of the placenta, and shivering/fever. The 2 treatment groups did not differ significantly with respect to the primary outcome; the hematocrit fell by 10% or more in 3.4% of oxytocin-treated women and 3.7% of the misoprostol group. There also were no significant differences in secondary outcomes except for the more frequent use of additional oxytocin in the misoprostol group (51% versus 41%). The major indication was uterine atony, with or without bleeding. No patient in either group required blood transfusion, underwent hysterectomy, or died. Shivering occurred in 7% of the misoprostol group, but was self-limited and caused no distress. Fever also was more prevalent in misoprostol-treated women, but was not clinically significant. The investigators believe that injectable oxytocic treatment is preferable to misoprostol for preventing postpartum hemorrhage, but that low-dose oral misoprostol therapy could be a practical option in settings where resources are limited.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.009 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".